Traxxas X-Maxx/XRT Waterproof Digital High-Torque ServoThis is the Traxxas X Maxx XRT Waterproof Digital High Torque Servo. This metal gear (ball bearing) waterproof servo also includes the servo saver spring and assembled steering link. The X Maxx steering servo includes full metal gears and adds a massive 23% more torque to take on the most extreme environments. The kit also includes a stiffer servo saver spring and steel steering linkage for increased precision and control during high speed driving.